You mention proof of work vs proof of stake, and then two sentences later you claim that nobody is paying to the environmental impact of cryptocurrency mining.
The whole point of proof of stake is to avoid the energy waste that proof of work requires to secure a blockchain. It's not just a technical challenge -- it's one potential solution to very problem you're describing.
Is proof of stake actually going to work at scale? I don't know for sure, and I don't think anybody else really does -- but the point is that not only are people talking about the environment, they're actively working on solutions.
The whole point of proof of stake is to avoid the energy waste that proof of work requires to secure a blockchain. It's not just a technical challenge -- it's one potential solution to very problem you're describing.
Is proof of stake actually going to work at scale? I don't know for sure, and I don't think anybody else really does -- but the point is that not only are people talking about the environment, they're actively working on solutions.